Transcript Motion Review

Motion Review
Question 1
 Describe an electromagnetic wave in
terms of what kind of wave it looks like
and what it travels through.
Answer 1
 An electromagnetic wave is a
transverse wave and can travel
through a vacuum.
Question 2
 What mathematical equation could
represent the length of Q?
Answer 2
Q = S + T
Question 3
 A student throws a
ball against a wall.
What is happening
in the picture in
terms of forces
exerted?
Answer 3
 The force from the wall on the ball is
equal to the opposite force from the
ball on the wall.
Question 4
 A ball traveled 40 meters at a speed of
8 meters per second.
 T = D/S
 How long did it take the ball to travel
the 40 meters?
Answer 4
 5 seconds
Question 5
 Work is performed by a lever when a load
(L) of 5 N is applied at one end, as shown.
Using the formula, what force is required to
make the lever balance?
Answer 5
 10 newtons
Question 6
 A lever and an inclined plane are shown.
What is the function of these simple
machines?
Answer 6
 They both can help raise objects from
the ground.
Question 7
 Classify each kind of wave as transverse or
longitudinal:
 ultraviolet waves
 radio waves
 sound waves
 x-ray waves
Answer 7
 ultraviolet waves—transverse
 radio waves—transverse
 sound waves—longitudinal
 x-ray waves—transverse
Question 8
 Compare these
two waves in terms
of crests,
wavelength,
frequency, and
amplitude.
Answer 8
 Crests: same
 Wavelength: Wave 2 is greater
 Frequency: Wave 1 is greater
 Amplitude: same
Question 9
 A car is traveling forward at an initial
velocity of 20 meters per second. The car
then accelerates forward at a rate of ½
meter per second2 for 30 seconds.
 Vf = Vi + at
 Velocity(final) = velocity(initial) + acceleration x time
 What is the final velocity of the car?
Answer 9
 35 meters per second
Question 10
 A ball rolls 20 meters in 5 seconds.
 S = d/t
 What is the average speed of the ball?
Answer 10
 4 meters per second
Question 11
 A student applied a force of 20 newtons to
pull a wagon a distance of 10 meters in the
direction of the applied force.
 W = fd
 How much work did the student do to the
wagon?
Answer 11
 200 Joules or 200 newton-meters
Question 12
 A student needs to move a heavy
object across 50 meters of level
ground. Which simple machine will
most help the student move the
object?
Answer 12
 wheel and axle
Question 13
 Describe the difference between
longitudinal waves and transverse
waves in terms of particle movement.
Answer 13
 Particles in a longitudinal wave travel
in the direction of the wave, while
particles in transverse waves travel
perpendicular to the wave.
Question 14
 Name the labeled parts of the wave.
Answer 14
 1—amplitude
 2—wavelength
 3—wave height
 4—crest
Question 15
 What is Newton’s 1st Law of Motion?
Answer 15
 An object at rest will stay at rest and
an object in motion will stay in motion
unless acted on by an unbalanced
force.
Question 16
 D = rt
 A cheetah can run at a rate of 30
meters per second. How far could a
cheetah travel in 10 seconds.
Answer 16
 300 meters
Question 17
 A student performed 20 joules of work
by raising an object 2 meters with a
pulley.
 F = w/d
 What was the force on the object?
Answer 17
 10 newtons
Question 18
 A logger splits a piece
of wood. What simple
machine splits the
wood?
Answer 18
 wedge
Question 19
 Which diagram
best represents
particle
movement in a
transverse wave?
Answer 19
 the third picture
Question 20
 As wavelength decreases, what
happens to the crests of a wave?
Answer 20
 They get closer together.
Question 21
 F = ma
 Explain this equation in terms of
acceleration.
Answer 21
 The acceleration of an object depends
on the force acting upon it and its
mass.
Question 22
 s = d/t
 A student rode a bicycle 40 miles in 2
hours. What was the student’s average
speed?
Answer 22
 20 miles per hour
Question 23
 F = w/d
 How much force was applied to a box
that required 50 joules of work to push
it up a 5-meter-long ramp?
Answer 23
 10 newtons
Question 24
 A portion of the
human arm works as
a simple machine.
Which simple
machine is most like
the human arm?
Answer 24
 a lever